DeBounce - Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.
Find That Email - The yellow pages of emails.
clearout.io - The easiest and real-time email verification and validation tool.
ContactOut - ContactOut is a chrome extension to find emails and contact numbers.
DataValidation - Email validation and email verification service integrated with MailChimp, MailUp, HubSpot and Zapier.
Email Verifier - Email verifier app lets you verify email.